A voltaic cell prepared using zinc and iodine has the following cell notation. Zn(s) | Zn²⁺(aq) || I⁻(aq) | I₂(s) | C(graphite)
Which of the following equations correctly represents the balanced, spontaneous, cell reaction?

Question

Quizplus · Accepted Answer

The anode is Zn(s) | Zn²⁺(aq) and the cathode is I₂(s) | I⁻(aq) | C(graphite). The half-reactions are: Anode (oxidation): Zn(s) → Zn²⁺(aq) + 2e- Cathode (reduction): I ⁻(aq) + e- → I₂(s) When we add these two half-reactions, we get the balanced overall reaction: Zn(s) + 2I ⁻(aq) → Zn²⁺(aq) + I₂(s)

A Voltaic Cell Prepared Using Zinc and Iodine Has the Following